Restore generic tap-locking Aura AI

[vanja-ivancevic]

• Restore automatic target selection for Auras that prevent enchanted permanents from untapping.
• Let the generic logic introduced in AttachAi: make KeepTapped logic generic #7361 run when cards do not declare AILogic.
• Fix Merseine and other affected Auras without card-specific script hints.

[tool4ever]

this shouldn't be needed, looks like the superior logic got broken via #7361 and should be fixed instead

[vanja-ivancevic]

this shouldn't be needed, looks like the superior logic got broken via #7361 and should be fixed instead

You’re right, thanks for pointing me to #7361. I’ve replaced the Merseine-specific workaround with a general fix and verified through a scripted game simulation that the AI now casts and resolves Merseine correctly.